My sister has been diagnosed with CRPS after being in a car accident a few months ago. Up to then, we thought she was just looking for attention. How can the doctor tell if she's really having pain?

CRPS, or complex regional pain syndrome, is diagnosed when other possible causes have been ruled out. CRPS is not a new illness; it was first identified in the Civil War among injured soldiers. If your doctor suspects CRPS, it may be based on any or all of these tests:

  • Medical history: has there been any earlier injury or trauma?
  • Physical exam: often the color and temperature of the skin on the affected side differs from the other side.
  • X-rays: to be sure that nothing is broken or out of place
  • Bone scan: after injecting dye, the doctor can see the bones
  • Tests of the nervous system: to rule out other illnesses
  • Magnetic resonance imaging (MRI): to show body parts that cannot be seen on x-ray.

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